import type { ImageMetadata, UnresolvedImageTransform } from '../types.js';
/**
 * Determines if the given source is an ECMAScript Module (ESM) imported image.
 *
 * @param {ImageMetadata | string} src - The source to check. It can be an `ImageMetadata` object or a string.
 * @return {boolean} Returns `true` if the source is an `ImageMetadata` object; otherwise, `false`.
 */
export declare function isESMImportedImage(src: ImageMetadata | string): src is ImageMetadata;
/**
 * Determines if the provided source is a remote image URL in the form of a string.
 *
 * @param {ImageMetadata | string} src - The source to check, which can either be an `ImageMetadata` object or a string.
 * @return {boolean} Returns `true` if the source is a string; otherwise, `false`.
 */
export declare function isRemoteImage(src: ImageMetadata | string): src is string;
/**
 * Resolves the source of an image transformation by handling asynchronous or synchronous inputs.
 *
 * @param {UnresolvedImageTransform['src']} src - The source of the image transformation.
 * @return {Promise<string | ImageMetadata>} A promise that resolves to the image source. It returns either the default export of the resolved source or the resolved source itself if the default export doesn't exist.
 */
export declare function resolveSrc(src: UnresolvedImageTransform['src']): Promise<string | ImageMetadata>;